package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO)
    {
        //像菜品表插入一条数据
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();

        //像口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors.size()>0&&flavors!=null)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO)
    {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        PageResult pageResult = new PageResult(page.getTotal(), page.getResult());
        return pageResult;
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    public void deleteBatch(List<Long> ids)
    {
        //起售中菜品不能删除
        for (Long id:ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE)
            {
                //起售中的菜品不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //被关联的菜品不能删除
        List<Long>setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0)
        {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id)
    {
        //菜品要有图片，分类,口味
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //查询口味数据
        List<DishFlavor>dishFlavors=dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;

    }
    /**
     *修改菜品
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO)
    {
        //修改菜品和口味，把原来的口味删除，添加新的口味
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        List<DishFlavor>dishFlavors=dishDTO.getFlavors();
        //根据id删除原来的口味，再更新现在的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        if(dishFlavors!=null&&dishFlavors.size()>0)
        {
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(dishFlavors);
        }

    }

}
